4-Bromobenzo[de]isochromene-1,3-dione(CAS: 21563-29-1)

4-Bromobenzo[de]isochromene-1,3-dione is a white crystalline solid with a molecular weight of approximately 253.03 g/mol. It is slightly soluble in water but more soluble in organic solvents like ethanol and acetone. The compound is reactive towards nucleophiles and can undergo substitution reactions. It has a melting point of around 190-192°C and a density of about 1.47 g/cm³.

4-Bromobenzo[de]isochromene-1,3-dione can be synthesized through a multistep process involving bromination of a chromene derivative, followed by isomerization and condensation steps. Common catalysts include Lewis acids, and the overall yield and selectivity can be improved by optimizing reaction conditions such as temperature and solvent choice.

4-Bromobenzo[de]isochromene-1,3-dione is primarily used in the pharmaceutical and organic semiconductor industries. It serves as a key intermediate in the synthesis of various drugs and can also be used in the development of organic electronic materials for applications such as organic light-emitting diodes (OLEDs) and photovoltaic devices.

When handling 4-Bromobenzo[de]isochromene-1,3-dione, it is essential to wear appropriate personal protective equipment (PPE) such as gloves, goggles, and a lab coat. Work must be conducted in a well-ventilated area or a fume hood to minimize exposure to fumes. Spills should be cleaned up promptly with appropriate absorbents, and appropriate safety data sheets (SDS) should be consulted for detailed handling and disposal instructions.